Hi, I guess your problem is that the bookmark disappeared after updating Firefox. Here are the steps below to help you get your bookmark back. Step 1: Click on the menu button to open the menu panel Step 2: Select bookmarks and click on the Manage Bookmarks bar at the bottom. Step 3: It brings the library window, then click Import and Backup button, then select Restore. Step 4: Select the backup you want to restore from the list of outdated automatic backups. Step 5: You can also select "Select File..." and if a file was created, you can restore the bookmark in a manual backup Step 6: After confirming your selection, the bookmarks from the backup you selected will be restored. If there are still questions, I hope the following link can help you. Link: https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks